Because of the undeniable advances in genetic and nutrition, dairy industry can produce great amount of milk per cow per year more efficiently nowadays. However, these improvements may be overshadowed by the emergence of problems regarding low reproductive performance of animals. Both in its clinical and subclinical forms, mastitis is linked to stressin dairy cattle, and such association undermines their reproductive performance. Livestock producers should give preferential attention to the task of improving the environmental conditions and management of their production units, since such conditions are largely responsible of animal health detriment, and affect the incidence of reproductive disorders, increasing significantly production costs of dairy industry.